Patents Assigned to Shuttelift, Inc.
  • Patent number: 5180070
    Abstract: A directional control system for a gantry type cane operable in either a longitudinal direction or a transverse direction is disclosed. The gantry type crane has first and second, spaced front wheels and first and second, spaced rear wheels. The first front wheel and the first rear wheel are on one longitudinal side of the crane, and the second front wheel and the second rear wheel are on the other longitudinal side of the crane. The control system cooperatively rotates the first and second front wheels for controlling the direction of travel of the crane in the longitudinal direction, and cooperatively rotates the first front wheel and the first rear wheel for controlling the direction of travel of the crane in the transverse direction. Thus the wheels positioned perpendicular to the direction of travel provide the steering.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: January 19, 1993
    Assignee: Shuttelift, Inc.
    Inventor: Thomas H. Feider